Modified cellulose ethers iboka rakasiyana remakemikari emakemikari anotorwa kubva ku cellulose, yakasikwa polymer inowanikwa muchirimwa sero madziro.Cellulose ilinear cheni yepolymer inoumbwa nemayuniti eglucose akabatanidzwa pamwechete ne β-1,4-glycosidic bond.Ndiyo yakanyanya kuwanda yemapolima paPasi uye ine zvinhu zvakawanda zvinobatsira senge simba repamusoro, kuderera kwehudhi, biodegradability, uye kuvandudzwa.
Modified cellulose ethers inoumbwa nekuunza akasiyana makemikari mapoka mu cellulose molecule, iyo inoshandura maitiro ayo emuviri nemakemikari.Iyi shanduko inogona kuwanikwa nenzira dzinoverengeka, kusanganisira etherification, esterification, uye oxidation.Iyo inoguma yakagadziridzwa cellulose ethers ine huwandu hwakasiyana hwekushandisa mumaindasitiri akasiyana, kusanganisira chikafu, mishonga yemishonga, zvizorwa, kuvaka, uye machira.
Imwe mhando yakajairika yemodified cellulose ether imethyl cellulose (MC), iyo inoumbwa nekuita seruserune nemethyl chloride.MC is a non-ionic, water-soluble polymer iyo inoshandiswa zvakanyanya sechinhu chakakora muzvokudya, sebhainda mune zvekeramic, uye sejira mukugadzira mapepa.MC ine akati wandei mabhenefiti pane mamwe makobvu, sekukwanisa kwayo kugadzira girosi yakajeka, kuderera kwayo muchetura, uye kuramba kwayo kushatisa enzyme.
Imwe mhando yemodified cellulose ether is hydroxypropyl methyl cellulose (HPMC), iyo inoumbwa nekuita selulosi nemusanganiswa wepropylene oxide uye methyl chloride.HPMC isiri-ionic, mvura-inonyungudika polima iyo inoshandiswa zvakanyanya seyakakora mumiriri mune zvekudya uye zvigadzirwa zvekuchengeta munhu, sebhainda mumapiritsi emishonga, uye sejira muindasitiri yekuvaka.HPMC ine mabhenefiti akati wandei pane mamwe makobvu, sekukwanisa kwayo kuumba gel dzakatsiga pakudzika kwakadzika, viscosity yayo yakakwirira pakudziya kwakaderera, uye kugarisana kwayo neyakasiyana-siyana yezvimwe zvinongedzo.
Carboxymethyl cellulose (CMC) imwe mhando yemodified cellulose ether inoumbwa nekuita seruseru ine monochloroacetic acid.CMC ipolymer inonyungudika nemvura inoshandiswa zvakanyanya seyakakora mumiriri, stabilizer, uye emulsifier muchikafu, mishonga, uye zvigadzirwa zvekuchengeta munhu.CMC ine mabhenefiti akati wandei pane mamwe makobvu, sekugona kwayo kuumba girosi akajeka, simba rayo rekubata mvura, uye kuramba kwayo kuparara kwe enzyme.
Ethyl cellulose (EC) imhando yemodhid cellulose ether iyo inoumbwa nekuita seruzevha ine ethyl chloride.EC isiri-ionic, mvura-isina kunyungudika polima iyo inoshandiswa zvakanyanya seyakaputira muindasitiri yemishonga.EC ine zvakawanda zvakanakira pamusoro mamwe coatings, akadai kukwanisa kwayo kuumba inoenderera firimu, yakaderera viscosity, uye kuramba unyoro uye kupisa.
Hydroxyethyl cellulose (HEC) imwe mhando yemodified cellulose ether inoumbwa nekuita selulosi ine ethylene oxide.HEC ipolymer inonyungudika mumvura iyo inoshandiswa zvakanyanya sechinhu chinokora muzvigadzirwa zvekuchengetedza munhu uye sechinosungira mumapiritsi emishonga.HEC ine mabhenefiti akati wandei pane mamwe makobvu, sekukwanisa kwayo kuumba girosi akajeka, simba rayo repamusoro rekubata mvura, uye kuenderana kwayo nehuwandu hwakawanda hwezvimwe zvinongedzo.
Hunhu uye mashandisirwo eethers akagadziridzwa cellulose zvinoenderana nezvinhu zvakati wandei, zvakaita serudzi rweboka remakemikari rakaunzwa, dhigirii rekutsiva, huremu hwemamorekuru, uye kunyungudika.Semuenzaniso, kuwedzera dhigirii rekutsiva MC kana HPMC kunogona kuwedzera simba ravo rekubata mvura uye viscosity, uku ichideredza kunyungudika kwavo.Saizvozvo, kuwedzera huremu hweCMC kunogona kuwedzera viscosity uye kugona kwayo kuumba gels, uku ichidzikisa simba rekubata mvura.
Mashandisirwo eakagadziridzwa cellulose ether akawanda uye akasiyana.Muindasitiri yechikafu, anoshandiswa seanokora, anosimbisa, uye emulsifiers mune dzakasiyana siyana zvigadzirwa, zvinosanganisira soups, sosi, dressings, uye madhiri.Modified cellulose ethers inoshandiswawo mukugadzirwa kwezvokudya zvakaderera-mafuta uye zvishoma-calori, sezvo vanogona kutevedzera maitiro uye muromo wemafuta pasina kuwedzera macalorie.Mukuwedzera, ivo vanoshandiswa semachira uye glazes mune confectionery zvigadzirwa kuvandudza chitarisiko chavo uye pasherufu hupenyu.
Muindasitiri yemishonga, yakagadziridzwa cellulose ethers inoshandiswa semasungiro, disintegrants, uye machira mumapiritsi nemakapisi.Iwo anoshandiswawo se viscosity modifiers mune yemvura magadzirirwo, senge syrups uye suspensions.Mamodified cellulose ethers anodiwa pane mamwe maexcipients, sezvo ari inert, biocompatible, uye ane low toxicity.Vanopawo hukuru hwekutonga pamusoro pekusunungurwa kwezvinodhaka, izvo zvinogona kuvandudza kushanda kwavo nekuchengeteka.
Muindasitiri yezvizorwa, mamodhid cellulose ethers anoshandiswa seanokora, emulsifiers, uye anodzikamisa mumakirimu, lotions, uye gels.Ivo zvakare vanoshandiswa semafirimu-ekugadzira vamiririri mune zvigadzirwa zvekuchengeta bvudzi, senge shampoos uye conditioners.Modified cellulose ethers inogona kuvandudza kuumbwa uye kutaridzika kwezvigadzirwa zvezvizoro, pamwe nekusimudzira kushanda kwavo nekugadzikana.
Muindasitiri yekuvaka, maether ecellulose akagadziridzwa anoshandiswa sezvikobvu, mabhainda, uye zvinhu zvinochengeta mvura musimende, dhaka, uye plaster.Vanogona kuvandudza kushanda, kuenderana, uye kusimba kwezvinhu izvi, pamwe nekuderedza shrinkage yavo uye kuputika.Modified cellulose ethers inoshandiswawo semachira uye zvinonamira mumadziro emadziro uye pasi.
Muindasitiri yemachira, yakagadziridzwa cellulose ethers inoshandiswa senge saizi agents uye thickeners mukugadzira machira neshinda.Ivo vanogona kuvandudza mabatiro uye kuruka zvinhu zvemachira, pamwe nekuwedzera simba ravo uye kusimba.
Pakazere, akagadziridzwa cellulose ethers anochinja-chinja uye akakosha makomisheni ane akawanda maapplication mumaindasitiri akasiyana.Ivo vanopa akawanda mabhenefiti pamusoro pemamwe mapolymer, senge biocompatibility yavo, biodegradability, uye hunhu hunogoneka.Vanopawo hupamhi hwekutonga pamusoro pehutano hwemuviri uye makemikari ezvigadzirwa, izvo zvinogona kuvandudza kunaka kwavo nekushanda.Saka nekudaro, ma modified cellulose ethers angangoramba achiita basa rakakosha mukugadzirwa kwezvinhu zvitsva uye zvitsva mune ramangwana.
Nguva yekutumira: Kubvumbi-22-2023